(organic chemistry) Any vinyl imine CH₂=CH-CH=NH or CH₂=CH-N=CH₂; any derivative of these compounds

Third-person singular simple present indicative form of wap

A surname originating as a matronymic. / A female given name transferred from the surname, of mostly British usage, variant of Madison.

(mineralogy, dated) A variety of barite that emits a foetid odour when rubbed or heated.